Reach parents in Hanoi, a supplier in Ho Chi Minh City, or family back home from Little Saigon, straight from your browser to any Vietnamese mobile or landline.
Rates updated September 15, 2026
To reach a Vietnam number from the United States, dial these three parts in order.
011 84 912 345 678
From any mobile, anywhere in the world, you can dial +84 912 345 678 instead. Press and hold 0 to type the +, and the phone picks the right access code for wherever you are.
Numbers in Vietnam are written locally with a 0 in front, like 0912 345 678. Calling from abroad you leave that 0 out, so it becomes +84 912 345 678.
A typical Vietnam mobile number is 9 digits after +84. If a call does not connect, count the digits first.
Only the first part changes. Your access code replaces the 011, then 84 and the number stay exactly the same.
A ~ means wait for the second dial tone before dialing the rest. It is not a digit you press.
Calls to Vietnam are $0.25 a minute, billed by the minute. There is no connection fee, no monthly plan, and no minimum spend. You add prepaid credit from $5, and it never expires.
Only for the time you actually talk.
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The heaviest inbound flow into Vietnam comes from the United States, home to nearly 2.4 million Vietnamese Americans, the fourth-largest Asian American group - Wikipedia. Roughly 40 percent live in California and 14 percent in Texas - Wikipedia, so most calls into Vietnam originate from a handful of dense hubs: Little Saigon in Orange County (Westminster and Garden Grove, the largest Vietnamese community outside Vietnam, nearly 200,000 people) - Wikipedia, San Jose in the Bay Area, and Houston, Texas. These calls reach elderly parents in the home provinces (Nghe An, Quang Nam, the Mekong Delta), family in Ho Chi Minh City and Hanoi, and family businesses back home. Money follows the calls: Vietnam is a top-10 global remittance recipient, taking in around US$14 billion in 2023 - VietnamPlus, a flow driven largely by the diaspora phoning home to coordinate transfers, weddings, and Tet.
Beyond the US, strong inbound corridors run from Australia (large Vietnamese communities in Melbourne and Sydney), Canada (Toronto, Vancouver), France (the oldest Western Vietnamese diaspora, centered on Paris), (sizeable labor-migration communities), and (hundreds of thousands of Vietnamese guest workers, students, and marriage migrants who call home weekly), plus business calls from manufacturers and buyers worldwide sourcing from Vietnam's factories.
Dial your international access, then the country code 84. From a US phone that is 011 then 84; from InternationalCall.co in the browser you just enter the number with + and 84.
Drop the leading 0 (the trunk prefix). A number written locally as 090 123 4567 or (024) 3826 xxxx becomes 90 123 4567 or 24 3826 xxxx once you have added 84.
Dial the remaining 9 digits. Every current Vietnamese mobile and landline is exactly 9 digits after +84, so +84 plus 9 digits is the full, correct length.
The single biggest gotcha is the trunk 0: every Vietnamese number is written locally with a leading 0 (mobiles as 09x, 03x, 05x, 07x, 08x; Hanoi landlines as 024, Ho Chi Minh City as 028), and that 0 is dropped when you dial from abroad - Wikipedia. After +84 the number is always 9 digits. If a contact's mobile still starts with 01 (like 0169... or 0123...), it is a pre-2018 11-digit number that no longer works: those were converted to 03x/05x/07x/08x prefixes and the old form is dead - Wikipedia. Likewise a landline written with a single-digit area code (old Hanoi 4, HCMC 8) predates the 2017 area-code reform and needs the new 24/28 form - .
Two back-to-back reforms make older Vietnamese numbers a minefield, and both are recent enough that they still trip up address books and business cards. First, the 2017 area-code overhaul restandardized every landline area code: the whole country moved to codes starting with 2, Hanoi went from 4 to 24 and Ho Chi Minh City from 8 to 28, rolled out across 59 provinces in three waves between 11 February and 17 June 2017 - GBA Vietnam. Second, the 2018 mobile truncation cut every 11-digit mobile to 10 digits, replacing three-digit 01x carrier prefixes with two-digit 03x/05x/07x/08x ones and finishing around 15 September 2018 - Wikipedia. If you saved a Vietnamese contact before 2018, there is a real chance the number in your phone simply no longer rings.
Spam and scam calls are the everyday reality on the receiving end. Vietnam has fought a long war on "junk SIMs" (rac): SIM cards mass-registered on fake or mismatched identities and resold for spam and fraud. In 2023 operators purged over 12.5 million SIMs whose registration did not match the national population database - Vietnam.vn, and regulators have since pushed to stop pre-activated SIMs and SIM-swap OTP theft - . The upshot for you: Vietnamese recipients are wary of unknown numbers and screen aggressively, so a call from a familiar person is far more likely to be answered than a strange string of digits.
A current Vietnamese number is 9 digits after the country code, no exceptions, whether it is a phone in a rice-paddy village or a bank in central Hanoi - Wikipedia. Locally everything is written with a leading 0 (the trunk prefix): a Ho Chi Minh City mobile looks like 090 123 4567, a Hanoi landline like 024 3826 xxxx. From abroad you replace that 0 with +84, so those become +84 90 123 4567 and +84 24 3826 xxxx.
The first digit after the 0 tells you the type. 9, 3, 5, 7 and 8 are mobile ranges; 2 is the geographic landline range that carries the area code - Wikipedia. So if you see a number starting 02, it is a fixed line in a specific city; starting 09 or 03, it is a mobile that reaches the person anywhere in the country. This matters because mobiles dominate: Vietnam is overwhelmingly a mobile market, and most people you call will hand you a 09x or 03x number rather than a landline.
The two digits after the trunk 0 often reveal the network, which is useful when a relative asks who their carrier is. Viettel (the market leader, run by the military and holding the largest share of subscribers) uses 032 to 039, 086, 087, 096, 097, 098 - Wikipedia. VinaPhone (part of state-owned VNPT) uses 081 to 085, 088, 091, 094, and MobiFone uses 070, 076 to 079, 089, 090, 093 - Wikipedia. Smaller players Vietnamobile (052, 056, 058, 092) and Gmobile (059, 099) round out the list.
Those three big networks together control the vast majority of the market, with Viettel, MobiFone and VNPT/VinaPhone commanding well over 90 percent of subscribers between them - Mordor Intelligence. For calling in, the carrier does not change anything: InternationalCall.co reaches any of them at the same flat Vietnam rate. But knowing the prefix helps you confirm you have a real, current mobile number rather than a mistyped or outdated one.
Vietnamese companies and government offices publish two very different kinds of contact. Many use a normal geographic landline (a Hanoi office on 024, an HCMC office on 028) that you dial exactly like any landline: +84 24 or +84 28 then the local number. Others, especially banks, e-commerce firms, and airlines, publish a 1800 (toll-free) or 1900 (premium-rate) hotline. These special short numbers are built for domestic dialing and generally do not work from outside Vietnam, so do not try to reach a bank's 1900 line from your browser abroad. Instead, use the bank's standard international landline (its head-office +84 24 or +84 28 number, usually listed on the English version of its website).
Business hours run Monday to Friday roughly 8:00 to 17:00 ICT, with a genuine lunch pause around 12:00 to 13:30 when many offices, and even some government counters, go quiet. Saturday mornings are common for smaller businesses. Given the UTC+7 offset, the practical window to reach a Vietnamese office from the US East Coast is your late evening to just past midnight (which is their morning), so many diaspora callers handle business calls the night before.
Most diaspora calls are to parents and grandparents, and two things shape when they answer. First, older relatives skew toward early schedules: a call landing at 6 to 8 pm Vietnam time (their dinner and after-dinner hours) usually catches them relaxed, which from the US is your early morning, 6 to 8 am Eastern. Calling much past 9 pm Vietnam time risks reaching someone already asleep, since rural and older Vietnamese households tend to turn in early.
Second, plan around Tet, the Lunar New Year, the most important holiday in Vietnam. In the days around Tet (late January or February, the date shifts each year), the whole country effectively pauses: offices close for roughly a week, people travel to their home provinces, and phone lines are flooded with well-wishing calls. It is the single most meaningful time to call home, and also the time you are most likely to get a busy signal, so try slightly off the peak greeting hours if you cannot get through. Outside Tet, ICT never changes (Vietnam observes no daylight saving), so once you have found a good calling window it stays the same all year.
Vietnam runs on a single time zone (UTC+7) from the northern border to the Ca Mau tip, so there is no north-south offset to juggle, unlike calling across, say, the US or Russia. What varies is language and connectivity. Accents differ sharply between the northern (Hanoi), central (Hue, Da Nang), and southern (Ho Chi Minh City, Mekong) regions, but everyone shares the same numbering plan, so a Hanoi mobile and a Can Tho mobile are dialed identically: +84 then 9 digits.
Geographically, the three-digit area codes cluster by region. The far north around Hai Phong sits on 225, the central coast city of Da Nang on 236 and Hue on 234, the south-central resort city Nha Trang (Khanh Hoa) on 258, and the Mekong Delta hub Can Tho on 292 - Wikipedia. Only Hanoi (24) and Ho Chi Minh City (28) kept two-digit codes; every other province standardized to three digits in the 2017 reform - GBA Vietnam. In practice, because mobiles dominate, you will rarely dial an area code at all: most personal contacts hand you a 09x or 03x mobile that works the same no matter which province they are in.
Because Vietnam truncated all 11-digit mobile numbers to 10 digits in 2018. Numbers beginning 012x, 016x, 018x, 019x were reassigned to new two-digit prefixes (03x, 05x, 07x, 08x) while keeping the last seven subscriber digits, with the switchover completing around 15 September 2018 - Wikipedia. Ask your contact for their current number; the old 11-digit form is permanently dead.
Look at the digit right after the country code (after dropping the trunk 0). Mobiles start with 3, 5, 7, 8 or 9 (for example +84 90..., +84 32..., +84 78...) - Wikipedia. Landlines start with 2 as part of a geographic area code (Hanoi 24, Ho Chi Minh City 28, Da Nang 236). Both are 9 digits after +84 and both cost the same flat per-minute rate on InternationalCall.co.
After the 2017 reform: Hanoi is 24 and Ho Chi Minh City is 28 (both two-digit), while everywhere else is three digits starting with 2, including Hai Phong 225, Da Nang 236, Can Tho 292, Nha Trang (Khanh Hoa) 258, and Hue 234 - Wikipedia. From abroad you drop the leading 0, so a Hanoi landline is +84 24 followed by the local number.
No. Vietnam splits emergencies across separate three-digit lines: 113 for police, 114 for fire and rescue, 115 for ambulance, all free from any phone in Vietnam - Wikipedia. These are domestic-only and not something you dial from a browser abroad; call your contact directly and have them reach the local service.
Yes. InternationalCall.co places the call from your web browser to any Vietnamese mobile or landline. There is no app to install, no SIM, and the person you call needs nothing but their normal phone. You pay per minute from prepaid credit (from $5, credit never expires), and the flat per-country rate for Vietnam is shown before you dial.
No. InternationalCall.co uses one flat per-minute rate for Vietnam shown before you dial, with no off-peak or time-of-day pricing. Time of day only matters for reaching a person: aim for their daytime or evening given the UTC+7 offset (11 hours ahead of US Eastern), not for a lower price.
Add a little credit and dial any Vietnam number right from your browser.
Start callingCalling out of Vietnam, the international access code is 00, so a resident dials 00 + country code + number (for the US that is 00 1, then the 10-digit number) - Wikipedia. The busiest outbound destinations mirror the diaspora and the labor economy: the United States (family in California and Texas), South Korea and Japan (where relatives work and study), Taiwan (guest workers and marriage migrants), plus China for cross-border trade near the northern border. A local quirk worth knowing: carriers heavily market cheaper VoIP-style international prefixes, so many Vietnamese place overseas calls through operator internet-call codes or apps like Zalo (the dominant messaging app in Vietnam) rather than the raw 00 route. For the person calling INTO Vietnam, none of that matters: InternationalCall.co connects from your browser regardless of which app or carrier the recipient uses.
One more reachability wrinkle is the 2G shutdown. Vietnam switched off its 2G network in October 2024, after a storm-related delay, forcing the last 10 million-plus 2G subscribers (often elderly relatives on old feature phones) onto 4G handsets - Ministry of Science and Technology. If an older relative went quiet in late 2024, a dead 2G phone, not a changed number, is often the cause. Vietnam also has no single 911: 113 is police, 114 fire and rescue, 115 ambulance - Wikipedia, so there is no one hotline to give a relative in an emergency.